/Engine/Source/Developer/AutomationDriver/Public/IDriverSequence.h
Queues a change of focus to the element for the default user
[IAsyncActionSequence](API\Developer\AutomationDriver\IAsyncActionSequence) & Focus ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IElementLocator](API\Developer\AutomationDriver\IElementLocator), ESPMode::ThreadSafe > & ElementLocator )